What is feminism and critical theory of Gayatri spivak?

She discusses the banning of the sati (the widow's sacrifice [killing] of herself on her husband's funeral tombstone). "the white man saves the brown woman from the brown man." The white man/European calls sati barbaric and oppressive. The brown man objects that sati isn't that common and cries that similar atrocities were performed in Europe (like the burning of witches and heretics); the brown man continues to explain that sati is a surefire way for a woman to achieve 'moksha' (self-liberation from the cycle of rebirth). Spivak points out that in the few places where sati was practiced, such as Bengal, women had the right to inherit which means there may have been some corrupting fiscal influences involved in the performance of sati (death by means of getting money). Still, all we hear about sati are re-presentations of what sati meant to women but it's never spoken by the sati-performing brown women themselves- thus the subaltern cannot speak.